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WO2010091910A1 - Soupape de surpression pour réceptacle d'emballage - Google Patents

Soupape de surpression pour réceptacle d'emballage Download PDF

Info

Publication number
WO2010091910A1
WO2010091910A1 PCT/EP2010/050246 EP2010050246W WO2010091910A1 WO 2010091910 A1 WO2010091910 A1 WO 2010091910A1 EP 2010050246 W EP2010050246 W EP 2010050246W WO 2010091910 A1 WO2010091910 A1 WO 2010091910A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
pressure relief
relief valve
sealing surface
base body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2010/050246
Other languages
German (de)
English (en)
Inventor
Hans-Peter Stadel
Herbert Stotkiewitz
Juergen Haak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP10700323.8A priority Critical patent/EP2396243B1/fr
Publication of WO2010091910A1 publication Critical patent/WO2010091910A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element

Definitions

  • the present invention relates to a pressure relief valve for a packaging container with significantly improved sealing properties.
  • Pressure relief valves for packaging containers are known from the prior art in various configurations.
  • the use of valves, in particular flexible packaging for food, is already realized by a variety of technical variants.
  • a main requirement of such valves is that they allow only small overpressures in the packaging by opening them and otherwise the ingress of
  • the pressure relief valve according to the invention with the features of claim 1 has the advantage that it is very small
  • the pressure relief valve comprises a base body having a through hole and a sealing surface and a membrane resting on the sealing surface.
  • the sealing surface has an inwardly tapering shape and between the membrane and the sealing surface is a thin fluid layer, in particular silicone oil arranged.
  • the membrane is flexible and has a deformable, i.e., soft, surface facing the sealing surface. This soft surface of the membrane allows the surface of the membrane to deform during sealing, thereby contributing to improved sealing at the sealing surface.
  • the tapered sealing surface promotes the formation of a fluid film of different thickness, such that on a radially outer side of the
  • Sealing surface of the fluid film is thinner than on a radially inner side. This results in different adhesion forces and capillary forces, which on the radially inner side allow easier opening at overpressure (smaller forces due to greater fluid film thickness) and on the radially outer side provide improved vacuum resistance (larger forces by smaller
  • the deformable surface disposed on the membrane is formed by a separate layer on a flexible membrane material.
  • a soft surface can be achieved by the separate layer and the other membrane material can be designed to be flexible and nevertheless have a certain rigidity and elasticity.
  • the entire membrane may be made of a material which ensures a soft surface of the membrane.
  • a plurality of radially inwardly projecting lugs are arranged on the base body, wherein the lugs center the membrane between them.
  • the base body comprises a plurality of retaining projections, which are integrally formed on the base body.
  • the retaining projections prevent this
  • a circumferential groove is arranged radially in the base body within the sealing area. This ensures that the sealing surface with a
  • the inner edge terminates at which the soft surface of the membrane can be compressed particularly well. As a result, even better sealing properties can be obtained.
  • Base body provided so that an outer edge of the sealing surface is formed, on which the soft membrane surface securely seals.
  • Butadiene rubber or silicone rubber.
  • the deformable surface is made of EPDM and the remaining membrane is made of NBR or silicone rubber.
  • the pressure relief valve further comprises a filter element, which is arranged at the passage opening.
  • the filter element is preferably arranged on a side of the base body directed towards the inside of the packaging.
  • a multiplicity of microperforations may be provided, which together constitute the
  • a diameter of the micro perforation must be smaller than an average diameter of the packaged goods in order to prevent the packaged good passes through the micro perforations in the pressure relief valve.
  • the base body has an edge region, which is designed to fix the pressure relief valve on an inner side of a package.
  • the edge region comprises an inner ring, an outer ring and a middle ring, wherein the center ring protrudes further from a base surface than the inner ring and the outer ring. This will during the sealing process for
  • Fixing the pressure relief valve on the inside of the packaging achieved that generated during the sealing process particles can be absorbed in the annular spaces between the inner ring and the center ring and the center ring and the outer ring and so can not lead to incomplete sealing of the pressure relief valve or in the
  • Pressure relief valve can get.
  • Figure 1 is a schematic sectional view of a pressure relief valve according to a first embodiment in the mounted
  • FIG. 2 shows a schematic sectional view of a main body of the pressure relief valve of FIG. 1
  • FIG. 3 is an enlarged fragmentary sectional view of FIG. 2;
  • FIG. 4 shows a plan view of the main body of FIG. 2,
  • FIG. 5 shows a schematic, enlarged view of a portion of the pressure relief valve according to the first embodiment
  • Figure 6 is a plan view of a main body of a pressure relief valve according to a second embodiment of the invention.
  • Figure 7 is a plan view of a main body of a pressure relief valve according to a third embodiment of the invention.
  • the overpressure valve 1 according to the invention comprises a main body 4 and a membrane 6.
  • the overpressure valve 1 is fixed to an inner side 3 a of a packaging 3.
  • openings 3b are provided, under which the pressure relief valve 1 is attached.
  • an interior of the package 3 is indicated by the reference numeral 2 and an outer side of the package (environment) with the
  • the pressure relief valve 1 has the task to deliver an optionally occurring in the packaging 3 overpressure to the outside 1 1 and seal a possibly prevailing in the package 3 vacuum with respect to the outside 1 1.
  • Such packages with pressure relief valve are used for example for coffee.
  • the base body 4 is cylindrical with a relatively small height and comprises an edge region 18 and a recess 23 enclosed by the edge region. In the depression 23, the base body 4 has a sealing surface 14 and a central base region 24.
  • a plurality of passage openings 9 are provided in the main body 4, through which a gas from the interior 2 to the outside 1 1 can flow.
  • the sealing surface 14 on the base body is formed such that it tapers towards the inside. This taper can be conical or alternatively arched or dome-shaped. Due to the inward taper of the sealing surface 14 is an outer edge 15 of the sealing surface is always at a slightly higher level than an inner edge 16 of the sealing surface.
  • higher level is meant that the outer edge 15 is located in a plane perpendicular to the center axis XX of the pressure relief valve 1, which is closer to the packaging wall closer to the packaging wall, as a plane perpendicular to the central axis XX through the inner edge sixteenth
  • the central base region 24 is also at a somewhat lower level than the inner edge 16. Furthermore, an outer annular groove 13 is provided radially outside the sealing surface 14 and radially inside the sealing surface 14 an inner annular groove 12. The two annular grooves 12, 13 are formed circumferentially, wherein the outer annular groove 13 is slightly deeper than the inner annular groove 12th
  • a plurality of radially inwardly directed lugs 17 are provided on a shoulder of the body. As can be seen in particular from FIG. 1, the lugs 17 are formed in such a way that they center the membrane 6 between them. Furthermore, three down holders 22 are integrally formed on the base body 4, which prevent the membrane 6 from being released from the base body 4 by mistake. This is particularly important in the assembly of the pressure relief valve 1 or when a high pressure from the interior 2 is discharged to the outside and the membrane 6 performs a relatively large movement.
  • the edge region 18 is designed for a simple sealing process by means of ultrasound.
  • the edge region 18 comprises an outer ring 20, a middle ring 19 and an inner ring 21.
  • the middle ring 19 protrudes further from a base surface 25 than the outer ring 20 and the inner ring 21.
  • an improved sealing behavior can be achieved. since any particles generated during sealing may fall into the spaces between the outer ring and the middle ring or the middle ring and the inner ring.
  • three passage openings 9 are provided in the central base area 24, which are arranged distributed in the same direction in the circumferential direction.
  • the through holes 9 in this case have a same shape and are separated from each other by webs 10. Furthermore, a flat recess 26 is provided on a directed to the interior 2 side 7 of the base body 4, in which a filter element 8 is received (see Figure 1).
  • the filter element 8 is preferably also fastened by means of ultrasonic welding to the base body 4, wherein in the recess an annular projection 8a (or an energy director) is provided. This allows a fast, clean ultrasound seal with high strength.
  • a thin fluid layer 5 is provided between the sealing surface 14 on the base body 4 and the membrane 6. If a pressure in the package 3 is above an ambient pressure on the outside 11, then one of the
  • Membrane 6 are larger than the capillary or adhesive forces that hold the membrane on the base body 4. Due to the tapered configuration of the sealing surface 14 is now causes a fluid layer thickness in the region of the inner edge 16 is greatest and the capillary forces in this area are thereby the smallest. This is comparatively small
  • the pressure relief valve 1 makes it possible to open at comparatively low overpressures of ⁇ 500 Pa above the pressure on the outer side 11.
  • FIG. 5 shows a state in which the membrane 6 is just lifted off the central base region 24, but still on the sealing surface 14 is applied.
  • the internal overpressure can press on the circular cross-sectional area of the membrane 6 exposed according to the inner edge 16, so that a significantly larger area exists compared to the initial state in which the internal pressure acts only on the three passage openings 9 on the membrane 6 is.
  • an opening operation of the membrane is further supported.
  • a small gap to the main body 4 is present at the radially outer region of the membrane 6, via which the overpressure then into the space between the pressure relief valve 1 and the packaging 3 and from there via the openings 3b to the outside 11 can flow.
  • the membrane 6 is pressed both on the sealing surface 14 and on the central base region 24. As a result, the membrane seals 6 in addition to the seal on the actual sealing surface 14 in addition to the middle
  • the soft or deformable surface 6a of the membrane 6 achieves in this case that deformation of the surface 6a occurs, in particular in the area of the sealing surface 14 (see FIG.
  • the membrane 6 is reinforced in particular in the region of the outer edge 15 by the inwardly conical shape of the sealing surface 14 reinforced deformed on the surface, so that in the region of the outer edge 15 only a very small fluid film thickness is present. Due to the tapered design of the sealing surface 14, the fluid is thus present at the outer edge 15 with only a small fluid thickness and at the inner edge 16 with a slightly larger fluid thickness. The very low fluid thickness in the region of the outer edge 15 thus causes a very high
  • the soft or deformable surface of the membrane 6 according to the invention additionally supports the vacuum resistance of the valve, without thereby opening characteristic with only slight pressure differences between the
  • the overpressure valve 1 of the second exemplary embodiment essentially corresponds to that of the first exemplary embodiment, wherein in the second exemplary embodiment the through-openings are embodied differently from the first exemplary embodiment.
  • a large number of small perforations 29 are provided, which are each formed in base areas 27 in three recesses 28.
  • Each of the perforations 29 has a diameter of about 60 to 120 microns.
  • Figure 7 shows a pressure relief valve 1 according to a third embodiment of the
  • a central recess 30 is provided in the third embodiment and the plurality of perforations 29 are formed in a base 31 of the central recess 30.
  • the perforations 29 are arranged distributed at different radii along the circumferential direction. It should be noted, however, that it is also possible for the perforations to be irregular.
  • the third embodiment has only one annular surface 32, which the central recess 30 from the inner
  • Ring groove 12 separates.
  • This annular surface 32 thus corresponds to the central base region 24 in the preceding embodiments. Otherwise, this embodiment corresponds to the previous embodiments, so that reference can be made to the description given there.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Safety Valves (AREA)

Abstract

La présente invention concerne une soupape de surpression destinée à un réceptacle d'emballage (3), comprenant : un corps de base (4) qui présente au moins une ouverture de passage (9), une surface d'étanchéité (14) et une zone marginale (18), la zone marginale (18) pouvant être reliée de manière hermétique à un côté intérieur (3a) du réceptacle d'emballage (3) et la surface d'étanchéité (14) présentant une forme qui s'effile vers l'intérieur; et une membrane (6) qui recouvre la surface d'étanchéité (14) du corps de base (4) pour assurer l'étanchéité et referme l'ouverture de passage (9), un fluide (5) se trouvant entre la surface d'étanchéité (14) et la membrane (6), la membrane (6) étant souple et présentant une surface (6a) déformable orientée vers la surface d'étanchéité (14).
PCT/EP2010/050246 2009-02-12 2010-01-12 Soupape de surpression pour réceptacle d'emballage Ceased WO2010091910A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10700323.8A EP2396243B1 (fr) 2009-02-12 2010-01-12 Soupape de surpression pour un récipient d'emballage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009000805.5 2009-02-12
DE200910000805 DE102009000805A1 (de) 2009-02-12 2009-02-12 Überdruckventil für einen Verpackungsbehälter

Publications (1)

Publication Number Publication Date
WO2010091910A1 true WO2010091910A1 (fr) 2010-08-19

Family

ID=41697978

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/050246 Ceased WO2010091910A1 (fr) 2009-02-12 2010-01-12 Soupape de surpression pour réceptacle d'emballage

Country Status (3)

Country Link
EP (1) EP2396243B1 (fr)
DE (1) DE102009000805A1 (fr)
WO (1) WO2010091910A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2015219B1 (en) 2015-07-24 2017-02-08 Flexible Consulting B V One-way degassing valve.
IT202000005932A1 (it) 2020-03-19 2021-09-19 Aroma System S R L Valvola di degassificazione
IT202200004763A1 (it) 2022-03-11 2023-09-11 Goglio Spa Valvola di degassazione per un contenitore ermetico

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1360753A (fr) * 1963-03-11 1964-05-15 Perfectionnement aux sachets et autres récipients analogues comportant une soupape en matière plastique
EP0499783A1 (fr) * 1991-02-16 1992-08-26 Robert Bosch Gmbh Valve de surpression pour emballages
US5992442A (en) 1997-05-29 1999-11-30 Urquhart; Edward F. Relief valve for use with hermetically sealed flexible container
WO2007113097A1 (fr) * 2006-04-06 2007-10-11 Tesa Ag Soupape de surpression pour recipient d'emballage
EP1802537B1 (fr) 2004-09-29 2008-05-14 Robert Bosch Gmbh Soupape de surpression pour un contenant d'emballage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4890637A (en) * 1988-12-12 1990-01-02 Flavorcoffee Co. Inc. One way valve
DE19843430A1 (de) * 1998-09-22 2000-03-23 Wipf Ag Volketswil Staubdichter Beutel für feinpulvrige Produkte
DE10140854A1 (de) * 2001-08-21 2003-03-06 Bosch Gmbh Robert Überdruckventil für einen Verpackungsbehälter und Vorrichtung zum Anbringen des Überdruckventils an einer Materialbahn
US20070125430A1 (en) * 2003-10-16 2007-06-07 Murray R C Packaging release valve for microwavable food items
DE102004061262A1 (de) * 2004-12-20 2006-06-29 Robert Bosch Gmbh Überdruckventil für einen Verpackungsbehälter
ITBO20060856A1 (it) * 2006-12-15 2008-06-16 Aroma System Srl Valvola di sfiato unidirezionale di tipo piatto.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1360753A (fr) * 1963-03-11 1964-05-15 Perfectionnement aux sachets et autres récipients analogues comportant une soupape en matière plastique
EP0499783A1 (fr) * 1991-02-16 1992-08-26 Robert Bosch Gmbh Valve de surpression pour emballages
US5992442A (en) 1997-05-29 1999-11-30 Urquhart; Edward F. Relief valve for use with hermetically sealed flexible container
EP1802537B1 (fr) 2004-09-29 2008-05-14 Robert Bosch Gmbh Soupape de surpression pour un contenant d'emballage
WO2007113097A1 (fr) * 2006-04-06 2007-10-11 Tesa Ag Soupape de surpression pour recipient d'emballage

Also Published As

Publication number Publication date
EP2396243B1 (fr) 2013-06-19
EP2396243A1 (fr) 2011-12-21
DE102009000805A1 (de) 2010-08-19

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